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Enhancement of Er luminescence from bridge-type photonic crystal nanocavities with Er, O-co-doped GaAs 铒、氧共掺砷化镓增强电桥型光子晶体纳米腔中的铒发光
Optics continuum Pub Date : 2023-10-03 DOI: 10.1364/optcon.501666
Zhidong Fang, Jun Tatebayashi, Ryohei Homi, Masayuki Ogawa, Hirotake Kajii, Masahiko Kondow, Kyoko Kitamura, Brandon Mitchell, Shuhei Ichikawa, Yasufumi Fujiwara
{"title":"Enhancement of Er luminescence from bridge-type photonic crystal nanocavities with Er, O-co-doped GaAs","authors":"Zhidong Fang, Jun Tatebayashi, Ryohei Homi, Masayuki Ogawa, Hirotake Kajii, Masahiko Kondow, Kyoko Kitamura, Brandon Mitchell, Shuhei Ichikawa, Yasufumi Fujiwara","doi":"10.1364/optcon.501666","DOIUrl":"https://doi.org/10.1364/optcon.501666","url":null,"abstract":"A bridge-type photonic crystal (PhC) nanocavity based on Er,O-codoped GaAs is employed to realize enhancement of Er luminescence. By adjusting the structural design and measurement temperature, the cavity mode's wavelength can be coupled to Er luminescence. The peak emission intensity from an Er-2O defect center was enhanced 7.3 times at 40 nW pump power and 77 K. The experimental Q-factor is estimated to be over 1.2 × 10 4 , and the luminescence intensity shows superlinearity with excitation power, suggesting Er luminescence amplification. This result would pave the way towards the realization of highly efficient single-photon emitters based on rare-earth elements.","PeriodicalId":74366,"journal":{"name":"Optics continuum","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135647672","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Control of dual-wavelength laser emission viaoptical feedback phase tuning 双波长激光发射的光反馈相位调谐控制
Optics continuum Pub Date : 2023-10-03 DOI: 10.1364/optcon.502550
Robert Pawlus, Stefan Breuer, Martin Virte
{"title":"Control of dual-wavelength laser emission viaoptical feedback phase tuning","authors":"Robert Pawlus, Stefan Breuer, Martin Virte","doi":"10.1364/optcon.502550","DOIUrl":"https://doi.org/10.1364/optcon.502550","url":null,"abstract":"We propose and demonstrate a technique to control the balance between the two amplitudes of a dual-wavelength laser based on a phase-controlled optical feedback. The feedback cavity length is adjusted to achieve a relative phase shift between the desired emission wavelengths, introducing a boost in gain for one wavelength while the other wavelength experiences additional losses. Tuning the optical feedback phase proves to be an effective way to control the gain and losses, and, thus, to select one or balance the amplitude of the two emission wavelengths. This concept can be easily adapted to any platform, wavelength range and wavelength separations providing that a sufficient carrier coupling and gain can be obtained for each mode. To demonstrate the feasibility and to evaluate the performance of this approach, we have implemented two dual-wavelength lasers with different spectral separations together with individual optical feedback loops onto a InP generic foundry platform emitting around 1550 nm. An electro-optical-phase-modulator is used to tune the feedback phase. With this single control parameter, we successfully achieved extinction ratios of up to 38.6 dB for a 10 nm wavelength separation and up to 49 dB for a 1 nm wavelength separation.","PeriodicalId":74366,"journal":{"name":"Optics continuum","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135648209","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Terahertz wireless communication systems: challenges and solutions for realizations of effective bidirectional links 太赫兹无线通信系统:实现有效双向链路的挑战和解决方案
Optics continuum Pub Date : 2023-10-03 DOI: 10.1364/optcon.500014
Mark Bergen, Seth Lowry, Michael Mitchell, Matthias Jenne, Christopher Collier, Jonathan Holzman
{"title":"Terahertz wireless communication systems: challenges and solutions for realizations of effective bidirectional links","authors":"Mark Bergen, Seth Lowry, Michael Mitchell, Matthias Jenne, Christopher Collier, Jonathan Holzman","doi":"10.1364/optcon.500014","DOIUrl":"https://doi.org/10.1364/optcon.500014","url":null,"abstract":"Wireless communication systems have evolved through a pursuit for broader bandwidths and a drive to higher frequencies. The drive has continued to present day and is now approaching the terahertz (THz) spectrum, where there exists great potential for broadband communication—and equally great challenges. Of note are the challenges of mobility for conventional THz transmitters, which have low transmitted powers, large sizes, and high power consumption. The proposed work recognizes these challenges and introduces the concept of retro-modulation in passive THz transceivers to have them establish passive THz links. Conventional (active) THz transceivers and links are contrasted to the proposed (passive) THz transceivers and links, with experimental and theoretical results given for THz retro-modulators having corner-cube and spherical retroreflectors with optical and electrical modulators. Ultimately, the findings show that passive THz links with high-frequency electronic transmitters and detectors and the proposed THz retro-modulators are capable of operation with signal-to-noise ratios between 10 to 20 dB at 300 GHz. Such findings open the door to future bidirectional THz wireless communication systems with mobile THz transceivers.","PeriodicalId":74366,"journal":{"name":"Optics continuum","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135689453","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Structural, electronic and optical characteristics of inorganic cubic perovskite Sr3AsI3 无机立方钙钛矿Sr3AsI3的结构、电子和光学特性
Optics continuum Pub Date : 2023-10-03 DOI: 10.1364/optcon.495816
Avijit Ghosh, Md. Ferdous Rahman, Md. Rasidul Islam, Md. Shoriful Islam, M. Hossain, Sagar Bhattarai, Rahul panday, Jaya Madan, Md. Atikur Rahman, Abu Bakar Ismail
{"title":"Structural, electronic and optical characteristics of inorganic cubic perovskite Sr<sub>3</sub>AsI<sub>3</sub>","authors":"Avijit Ghosh, Md. Ferdous Rahman, Md. Rasidul Islam, Md. Shoriful Islam, M. Hossain, Sagar Bhattarai, Rahul panday, Jaya Madan, Md. Atikur Rahman, Abu Bakar Ismail","doi":"10.1364/optcon.495816","DOIUrl":"https://doi.org/10.1364/optcon.495816","url":null,"abstract":"Inorganic perovskite materials have recently received significant consideration in the sector of solar technology because of their tremendous structural, optical, and electronic strengths. This research exhaustively inquired about the structural, optical, and electronic characteristics of the inorganic cubic perovskite Sr 3 AsI 3 utilizing the first-principles density-functional theory (FP-DFT). The Sr3AsI3 molecule exhibits a direct bandgap of 1.265 eV value at Γ point. According to band characteristics, this component has a strong absorption capability in the region of visibility, as demonstrated by optical parameters including dielectric functions, absorption coefficient, reflectivity, and electron loss function. It is discovered that the spikes of the dielectric constant of Sr 3 AsI 3 are visible in the photon energy range which are suitable for solar cells. As a result, the Sr 3 AsI 3 perovskite is considered suitable for the application of energy production and light management in solar cells.","PeriodicalId":74366,"journal":{"name":"Optics continuum","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135648207","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Complex refractive index measurements of Poly(methyl methacrylate) (PMMA) over the UV-VIS-NIR region 聚甲基丙烯酸甲酯(PMMA)在UV-VIS-NIR区域的复折射率测量
Optics continuum Pub Date : 2023-10-02 DOI: 10.1364/optcon.495634
Hong Pham, Hung Nguyen, Hoa Nghiem
{"title":"Complex refractive index measurements of Poly(methyl methacrylate) (PMMA) over the UV-VIS-NIR region","authors":"Hong Pham, Hung Nguyen, Hoa Nghiem","doi":"10.1364/optcon.495634","DOIUrl":"https://doi.org/10.1364/optcon.495634","url":null,"abstract":"","PeriodicalId":74366,"journal":{"name":"Optics continuum","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135830068","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Exploring the Impact of Incubation Times and Concentrations of Self-Assembled Monolayers on Electron Transfer in Biosensing 探索培养时间和自组装单层膜浓度对生物传感中电子转移的影响
Optics continuum Pub Date : 2023-09-29 DOI: 10.1364/optcon.502172
Aymen Qatamin, Shadi Alnaanah
{"title":"Exploring the Impact of Incubation Times and Concentrations of Self-Assembled Monolayers on Electron Transfer in Biosensing","authors":"Aymen Qatamin, Shadi Alnaanah","doi":"10.1364/optcon.502172","DOIUrl":"https://doi.org/10.1364/optcon.502172","url":null,"abstract":"","PeriodicalId":74366,"journal":{"name":"Optics continuum","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135199230","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
All-in-focus large-FOV GRIN lens imaging by multi-focus image fusion 基于多焦图像融合的全焦大视场GRIN透镜成像
Optics continuum Pub Date : 2023-09-29 DOI: 10.1364/optcon.500503
Dafei Xiao, Zhige Lin, Yoav Shechtman
{"title":"All-in-focus large-FOV GRIN lens imaging by multi-focus image fusion","authors":"Dafei Xiao, Zhige Lin, Yoav Shechtman","doi":"10.1364/optcon.500503","DOIUrl":"https://doi.org/10.1364/optcon.500503","url":null,"abstract":"","PeriodicalId":74366,"journal":{"name":"Optics continuum","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135199224","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Towards Miniaturized OCT-Guided LaserOsteotomy: Integration of Fiber-Coupled Er:YAGLaser with OCT 迈向小型化OCT引导激光截骨术:光纤耦合Er:YAGLaser与OCT的整合
Optics continuum Pub Date : 2023-09-25 DOI: 10.1364/optcon.497483
Arsham Hamidi, Yakub Bayhaqi, Alexander Navarini, Philippe Cattin, Azhar Zam, Ferda Canbaz
{"title":"Towards Miniaturized OCT-Guided LaserOsteotomy: Integration of Fiber-Coupled Er:YAGLaser with OCT","authors":"Arsham Hamidi, Yakub Bayhaqi, Alexander Navarini, Philippe Cattin, Azhar Zam, Ferda Canbaz","doi":"10.1364/optcon.497483","DOIUrl":"https://doi.org/10.1364/optcon.497483","url":null,"abstract":"Optical coherence tomography (OCT) combined with an ablative Er:YAG laser has been recognized as a promising technique for real-time monitoring and controlling the depth of laser-induced cuts during laser osteotomy procedures. In this study, a miniaturized OCT-assisted Er:YAG laser system was developed for controlled laser ablation of bone tissue. The developed system involved coupling a high-power Er:YAG laser into a sapphire fiber with a core diameter of 425 µm and miniaturizing the sample arm of a long-range swept-source OCT system. Controlled laser osteotomy experiments were performed to evaluate the performance of the miniaturized setup. Real-time depth monitoring and control were achieved through an optical shutter controlled by the OCT system. The experimental results showed controlled ablation with a mean accuracy of 0.028 mm when targeting depths of 1 mm, 3 mm, and 5 mm on cow femur bones. These results demonstrate the potential of the developed miniaturized OCT-assisted Er:YAG laser system for use in robotic-assisted minimally-invasive laser osteotomy.","PeriodicalId":74366,"journal":{"name":"Optics continuum","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135768727","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Direct observation of Anderson localization ofultracold atoms in a quasiperiodic lattice 准周期晶格中超冷原子安德森局域化的直接观察
Optics continuum Pub Date : 2023-09-25 DOI: 10.1364/optcon.499768
Wenbo Yan, Yuqing Li, Hongxing Zhao, Jizhou Wu, Wenliang Liu, Peng Li, Yongming Fu, Liantuan Xiao, Jie Ma, Suotang Jia
{"title":"Direct observation of Anderson localization ofultracold atoms in a quasiperiodic lattice","authors":"Wenbo Yan, Yuqing Li, Hongxing Zhao, Jizhou Wu, Wenliang Liu, Peng Li, Yongming Fu, Liantuan Xiao, Jie Ma, Suotang Jia","doi":"10.1364/optcon.499768","DOIUrl":"https://doi.org/10.1364/optcon.499768","url":null,"abstract":"Ultracold atoms in quasiperiodic lattices offer a versatile platform for studying many intriguingly disorder-driven phenomena. Here we study the quantum transport of noninteracting ultracold 133 Cs atoms in a one-dimensional quasiperiodic momentum lattice, which is formed by using the laser-coupled momentum states as synthetic dimensions. Through measurements of the site-resolved density distribution of atoms in the synthetic quasiperiodic lattice, we directly observe the transition from the atomic diffusive transport to Anderson localization in the initial injection site with increasing strength of the quasiperiodic modulation. We show the dependence of momentum width characterizing the atomic expansion degree on the quasiperiodic modulation strength, and our observation is in good agreement with the theoretical calculation. Our work provides significant insights for understanding the quantum spreading in disordered systems.","PeriodicalId":74366,"journal":{"name":"Optics continuum","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135769609","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Equalization in Dispersion-Managed SystemsUsing Learned Digital Back-Propagation 基于学习数字反向传播的分散管理系统均衡化
Optics continuum Pub Date : 2023-09-25 DOI: 10.1364/optcon.497117
Mohannad Abu-Romoh, Nelson Costa, Yves Jaouën, Antonio Napoli, João Pedro, Bernhard Spinnler, Mansoor Yousefi
{"title":"Equalization in Dispersion-Managed SystemsUsing Learned Digital Back-Propagation","authors":"Mohannad Abu-Romoh, Nelson Costa, Yves Jaouën, Antonio Napoli, João Pedro, Bernhard Spinnler, Mansoor Yousefi","doi":"10.1364/optcon.497117","DOIUrl":"https://doi.org/10.1364/optcon.497117","url":null,"abstract":"In this paper, we investigate the use of the learned digital back-propagation (LDBP) for equalizing dual-polarization fiber-optic transmission in dispersion-managed (DM) links. LDBP is a deep neural network that optimizes the parameters of DBP using the stochastic gradient descent. We evaluate DBP and LDBP in a simulated WDM dual-polarization fiber transmission system operating at 32 Gbaud/s per channel, with a dispersion map designed for a 28 × 72 km link with 15% residual dispersion. Our results show that in single-channel transmission, LDBP achieves an effective signal-to-noise ratio improvement of 6.3 dB and 2.5 dB using DP-16-QAM format, respectively, over linear equalization and DBP. In WDM transmission, the corresponding Q -factor gains are 1.1 dB and 0.4 dB, respectively. Additionally, we conduct a complexity analysis, which reveals that a frequency-domain implementation of LDBP and DBP is more favorable in terms of complexity than the time-domain implementation. These findings demonstrate the effectiveness of LDBP in mitigating the nonlinear effects in DM fiber-optic transmission systems.","PeriodicalId":74366,"journal":{"name":"Optics continuum","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135768597","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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